How Long Does It Take to Build a Mobile App?

"How long will it take?" is always the second question after "how much will it cost?" And just like cost, the honest answer is: it depends. But unlike cost, timelines have a tighter range — and there are concrete things you can do to compress them.

Phase-by-phase breakdown

Discovery & scoping (1–2 weeks)

Before writing a line of code, you need a spec. This phase covers: defining core user flows, agreeing on platform targets, mapping out integrations, and producing a project plan with milestones. Skipping or rushing this phase is the single most reliable way to double your total timeline later.

Design (2–4 weeks)

UX wireframes come first — flow and structure without visual polish. Once flows are approved, visual design follows: color, typography, component system. For an MVP with 10–12 screens, this takes 2 weeks if you have brand guidelines. Starting from scratch adds a week.

The most common bottleneck here: waiting for client feedback on designs. Each round of revisions adds 2–4 days. Budget for two rounds and stick to it.

Development (4–10 weeks)

This is where the timeline varies most. A focused MVP with 10 screens and a simple backend can ship in 4–5 weeks of active development. Add a second platform, a more complex backend, or third-party integrations and you're looking at 8–10 weeks.

• iOS only, 10 screens, basic REST API: 4–5 weeks
• iOS + Android (KMP), 15 screens, auth + data sync: 7–8 weeks
• Full product with custom backend, payments, real-time features: 10–14 weeks

QA & testing (1–2 weeks)

Functional testing, device coverage (we test on 8+ real devices), edge case validation, and performance profiling. This runs in parallel with development from sprint 2 onward, so the final QA phase is really a hardening pass — not a first look.

App Store submission (1–2 weeks)

Apple review currently averages 1–3 days for first submissions. Google Play is 24–72 hours. But plan for one rejection cycle — especially for apps with in-app purchases, login, or health data. We write submission notes specifically to reduce review friction, and our first- submission approval rate is over 90%.

Full timeline summary

• MVP (one platform, 10 screens): 6–10 weeks total
• Full product (iOS + Android, custom backend): 16–24 weeks total
• Complex app (marketplace, social, real-time): 24–36 weeks

What you can do to ship faster

• Have your brand guidelines and logo ready before kickoff
• Designate one decision-maker who can approve designs within 24 hours
• Define your MVP ruthlessly — every screen you cut saves 2–4 days
• Provide API documentation if you have an existing backend
• Set up your Apple Developer and Google Play accounts before week 1

What slows projects down

In our experience across 20+ projects, the top three timeline killers are:

• Scope changes after development starts — adding a feature mid-sprint costs 3× what it would have pre-sprint
• Slow feedback cycles — a 48-hour design approval delay compounds across every sprint
• Unclear requirements — building the wrong thing and rebuilding is the most expensive detour

None of these are technical problems. They're process problems — and they're all preventable with a solid discovery phase and a clear change-management agreement upfront.